Screw-wrench



(No Model.)

J.v RYAN.

80113 W WRENCH.

No. 447,163. Patented Feb. 24,1891.

ATTORNEYS WIN/88158: I

@MMM/ UNITED STATES I PATENT OFFI E.

JOHN RYAN, OF' NEW YORK, N. Y., ASSIGNOR TO HIMSELF, AND SEYMOUR I G. SMITH, OF PLAINFIELD, NEW JERSEY.

SCREW-WRENCH.

SPECIFICATION forming part of Letters Patent No. 447,163, dated February 24, 1891.

Application filed May 16, 1889. Serial No.3l0,944. (N0 model.) i

T0 aZZ whom it may concern.-

Be it known that I, JOHN RYAN, of New York city, in the county of New York and State of New York, have invented a new and useful Improvement in Wrenches, of which the following is a full, clear, and exact description.

The object of this invention is to provide a wrench of simple and durable construction and consisting of few parts. To this end the invention consists in the novel. construction and combination of the parts, as will be hereinafter fully set forth, and pointed out in the claims.

Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar letters of reference indicate corresponding parts in all the figures.

Figure 1 is a side elevationof my improved wrench, parts being broken away to better disclose the construction. Fig. 2,is 'adetail view of the operating-nnt'and its stem, and Fig. 3 is a transverse section taken practically on the line 3 3 of Fig. 1.

The shank A of the wrench is rectangular in cross-section, and is provided at its upper end with the usual fixed jaw B, and the inner edge of the shank A, which is concaved from the point a to the point I), is provided with screw-threads A, the inner end of the shank being properly shaped to form a handle A The adjustable jaw G is held to slide on the 'shank A by the straps C and G which are connected by an extension 0 of the jaw, said extension being recessed on its under side, as

. indicated by dotted lines in Fig. 1, to fit over the shank. The jaw C and its extension 0 are bored longitudinally at D, which bore is countersunk on the face of the jaw, as is shown at c in Fig. 1.

The operating-nut E is made solid and is provided with a-peripheral thread E, adapted to fit the threads A of the shank, and the edge of the threadE' is milled, as illustrated. The nut E is provided at one end with an integral axial stem Eiadapted to fit the bore D of the jaw C.

The jaw C is placed in proper position upon the shank A and the thread of the nut E is made to engage the threads of the shank.

The jaw C is next slid toward the nut E until the stem of the latter has entered the bore of the former, whereupon the end of the stem is upset into the countersink of the borc,eftec'tually retaining all the parts in operative position.

Itwill be observed that a wrench constructed as above described is very simple, being composed of but three parts, and that it is exceedingly strong, as the parts are not unduly weakened by being cut away; and it will be further observed that the complete wrench is capable of convenient and expeditious adjustment, and that the strain of use is so taken up by the arrangement of the parts 6 that a maximum of strength and security is obtained.

The axial stem is preferably made in one piece with the operating-nut. Therefore in the description of this piece of the wrench the word integral is employed; but the stem may be made of wrought metal and the nut of cast metal, in which event one end of the stem is firmly fitted in the nut, which arrangement renders the two parts virtually in- 7 5 tegral.

Having. thus described my invention, I claim as new and desire to secure by Letters Patent- 1. The combination, with a shank having a fixed jaw and provided with a threaded edge,

of an adjustable jaw held to slide on said shank by integral straps and provided with a longitudinal bore which is countersunk on the face of the jaw, and an operating-nut provided with a peripheral thread engaging the thread, of the shank and-havingafixed axial stem extending through the bore of the adjustable nut and upset at its end in the countersink of the said bore, substantially as described. I

2. The combination,with a shank having a fixed jaw and provided with a threaded edge, of an adjustable jaw held to slide upon said shank, provided withan extension on its un- 5 ,der face, a strap integral with the extension peripheral thread engaging the thread of the shank and having a fixed axial stem ext-ending through the bore of the adjustable jaw and its appendages and upset at its ends in the countersink of the said bore, substantially as shown and described, whereby the nut is located back of the jaw and serves as a support therefor, substantially as described.

Signed at New York, in the county of New York and State of New York, this 11th day of April, A. D. 1889.

JOHN RYAN.

Witnesses:

BENJ. T. PETTY,

ALOHA VIVARTTAS. 

